Matthew Poole and continuators on Deuteronomy 17:7

7 The hand of the witnesses shall be first upon him , to put him to death and afterward the hand of all the people : so thou shalt put the evil away from among you.

Either laid upon his head to design the person, or stretched out to throw the first stone at him. God thus ordered it, partly for the caution of witnesses, that, if they had through malice or wrath accused him falsely, they might now be afraid to imbrue their hands in innocent blood; partly for the security and satisfaction of the people in the execution of this punishment.

Who being all highly and particularly obliged to God, are bound to express their zeal for his honour and service, and their detestation of all persons and things so highly dishonourable and abominable to him.

Marginal references: Chap. 13. 9.; Chap. 13. 5.